package collection;

import java.util.ArrayList;
import java.util.Collection;

//集合间的操作
public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1=new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2=new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);//将c2添加到c1中,c2不变
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3=new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);
        boolean contains=c1.containsAll(c3);//判断c1中是否包含c3中的所有元素
        System.out.println("是否包含:"+contains);//false

        /*
        //取交集:c1中仅保留c3所共有的元素，而c3不变
        c1.retainAll(c3);
        System.out.println("c1:"+c1);//[c++,android]
        System.out.println("c3:"+c3);//[c++,android,php]
        */

        //删交集:将c1中与c3共有的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println("c1"+c1);//c1[java, .net, ios, java]
        System.out.println("c3:"+c3);//c3:[c++, android, php]
    }
}
